
How to Measure Time Without a Stopwatch
How can you measure time without using a stopwatch? You could use the movement of the Sun across the sky, watch a pendulum swing, or burn some very special string. Keep on reading to find out how it works!
Jason Marshall, PhD, is a research scientist, author of The Math Dude's Quick and Dirty Guide to Algebra, and host of the Math Dude podcast on Quick and Dirty Tips.

How to Measure Time Without a Stopwatch
How can you measure time without using a stopwatch? You could use the movement of the Sun across the sky, watch a pendulum swing, or burn some very special string. Keep on reading to find out how it works!

How Does Geometry Explain the Phases of the Moon?
What causes the Moon to change phases throughout the month? Why is it sometimes visible only during the day and other times only at night? What’s the relationship between these times and the Moon’s phases? The answer in all cases is geometry.

Why Is It Important to Study Math?
What’s the point of learning math? Why is it so important that kids are exposed to mathematical thinking? And what do parents and teachers need to know about learning real math? Keep on reading to find out.

What Are Mixed Fractions?
How do they work? And how can you turn them into improper fractions? Keep on reading to find out!

4 More FAQs about Percentages
How do you quickly calculate 25 percent of a number? Or 33 percent of a number? And how can you quickly calculate percentage increases?

How to Use Math to Fly Rockets to Space
What does it really mean for a satellite to orbit the Earth? What’s the math behind it? And what’s the math behind the rockets that get those satellites into orbit? Keep on reading to find out!

The Simple Math behind Crunching the Sizes of Crowds
How large was the crowd at the recent U.S. presidential inauguration? Or the inauguration eight years ago? Keep on reading to find out how crowd sizes are estimated

What Is the Probability That Alien Life Exists?
Are we alone in the universe? If so, why? If not, where is everybody? Thankfully, math can help us with these astronomically profound questions

How to Quickly Calculate Percentages
How to calculate percentages is easier than you think. Quick, what’s 36% of 25? Or how about 250% of 20? Learn a quick and dirty tip to help you calculate all of those pesky percentages in your head.

What Is a Light-Year?
Do you know what it is that a light-year actually measures? Do you know why so many people find it confusing? And why they really shouldn’t?

How to Use Statistics to Understand Poll Results
Learn how to use statistics to understand the significance of the latest political polling results and to keep yourself from being duped by misleading information

What Does Half-Life Mean?
What are half-lives? And what do they have to do with measuring the age of the solar system and predicting the effects of a morning cup of coffee? Keep on reading to find out!

How to Use Stars to Find Your Latitude
Have you ever wondered how people figured out their latitude back in the days before the Internet? Did you know you can use the same math trick they used to pinpoint your latitude today? Keep on reading to find out how it works

What Are Complex Numbers?
What do you get when you put a real and an imaginary number together? A complex number. No, not a complicated number (although it is kind of complicated). We’re talking about an entirely new set of numbers dubbed “complex”

What Is a Mathematical Limit?
Do you know what a limit is in math? Do you know how to define a circle using this idea? And do you know why you might want to? Keep on reading to find out!

How to Estimate Hours Left Until Sunset
Do you know that math can help you survive? I’m not talking about jobs, money, and feeding yourself—I mean the lost in the wilderness, life depends on it kind of surviving. How does this work? Keep on reading The Math Dude to find out

How to Measure Time without a Stopwatch
How can you measure time without using a stopwatch? You could use the movement of the sun across the sky, watch a pendulum swing or burn some very special string. Keep on reading to find out how it works!

What Are the Odds of Successfully Navigating an Asteroid Field?
What are the odds of successfully flying through an asteroid field like the one in The Empire Strikes Back? Are they really 3,720 to one as suggested by C-3PO? Or are they much worse…or perhaps better? Keep on reading to find out

What Is the Famous Monty Hall Problem?
Ever heard of the Monty Hall problem? If so, did the world famous brain teaser leave you flummoxed? If not, how does getting flummoxed—and then just as quickly un-flummoxed—sound? Hopefully you're up for the challenge (and the fun) because that's exactly what's in store for today!

The Equation for a Happy Mother's Day
What's the most important holiday in May? Obviously it's Mother's Day. But did you know there's an equation that can help you celebrate Mom? Keep on reading to find out what it is!

How Is Rainfall Measured?
How is rainfall measured? What does it mean when it rains an inch? And how many gallons of water fall on your roof in a storm? Keep on reading to learn all about the math behind April showers and May flowers

3 Super Bowl Fun Facts
Want to amaze your friends at that Super Bowl party you're going to? All you have to do is hit 'em with some Super Bowl math fun facts. Keep on reading to learn what they are!

New Year's Math Fun Facts
How many different New Year's Eve countdowns are there around the world? When do astronauts celebrate New Year's? Who celebrates first? And last? Keep on reading to learn all about these New Year's math fun facts

How to Solve the Famous Birthday Problem
What are the chances that two players on the same soccer team share a birthday? How about two students in the same algebra class? Both seem pretty unlikely, right? The answer might surprise you!